cregit-Linux how code gets into the kernel

Release 4.7 drivers/pnp/pnpbios/proc.c

Directory: drivers/pnp/pnpbios
/*
 * /proc/bus/pnp interface for Plug and Play devices
 *
 * Written by David Hinds, dahinds@users.sourceforge.net
 * Modified by Thomas Hood
 *
 * The .../devices and .../<node> and .../boot/<node> files are
 * utilized by the lspnp and setpnp utilities, supplied with the
 * pcmcia-cs package.
 *     http://pcmcia-cs.sourceforge.net
 *
 * The .../escd file is utilized by the lsescd utility written by
 * Gunther Mayer.
 *
 * The .../legacy_device_resources file is not used yet.
 *
 * The other files are human-readable.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <linux/pnp.h>
#include <linux/seq_file.h>
#include <linux/init.h>

#include <asm/uaccess.h>

#include "pnpbios.h"


static struct proc_dir_entry *proc_pnp = NULL;

static struct proc_dir_entry *proc_pnp_boot = NULL;




static int pnpconfig_proc_show(struct seq_file *m, void *v)
{
	struct pnp_isa_config_struc pnps;

	if (pnp_bios_isapnp_config(&pnps))
		return -EIO;
	seq_printf(m, "structure_revision %d\n"
		      "number_of_CSNs %d\n"
		      "ISA_read_data_port 0x%x\n",
		   pnps.revision, pnps.no_csns, pnps.isa_rd_data_port);
	return 0;
}


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alexey dobriyanalexey dobriyan1018.18%150.00%


Total55100.00%2100.00%






static int pnpconfig_proc_open(struct inode *inode, struct file *file)
{
	return single_open(file, pnpconfig_proc_show, NULL);
}


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alexey dobriyanalexey dobriyan2076.92%150.00%


dave jonesdave jones623.08%150.00%


Total26100.00%2100.00%




static const struct file_operations pnpconfig_proc_fops = {
	.owner		= THIS_MODULE,
	.open		= pnpconfig_proc_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};




static int escd_info_proc_show(struct seq_file *m, void *v)
{
	struct escd_info_struc escd;

	if (pnp_bios_escd_info(&escd))
		return -EIO;
	seq_printf(m, "min_ESCD_write_size %d\n"
			"ESCD_size %d\n"
			"NVRAM_base 0x%x\n",
			escd.min_escd_write_size,
			escd.escd_size, escd.nv_storage_base);
	return 0;
}


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alexey dobriyanalexey dobriyan1425.45%150.00%


Total55100.00%2100.00%






static int escd_info_proc_open(struct inode *inode, struct file *file)
{
	return single_open(file, escd_info_proc_show, NULL);
}


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alexey dobriyanalexey dobriyan2492.31%150.00%


dave jonesdave jones27.69%150.00%


Total26100.00%2100.00%




static const struct file_operations escd_info_proc_fops = {
	.owner		= THIS_MODULE,
	.open		= escd_info_proc_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};


#define MAX_SANE_ESCD_SIZE (32*1024)



static int escd_proc_show(struct seq_file *m, void *v)
{
	struct escd_info_struc escd;
	char *tmpbuf;
	int escd_size;

	if (pnp_bios_escd_info(&escd))
		return -EIO;

	/* sanity check */
	if (escd.escd_size > MAX_SANE_ESCD_SIZE) {
		printk(KERN_ERR
		       "PnPBIOS: %s: ESCD size reported by BIOS escd_info call is too great\n", __func__);
		return -EFBIG;
	}

	tmpbuf = kzalloc(escd.escd_size, GFP_KERNEL);
	if (!tmpbuf)
		return -ENOMEM;

	if (pnp_bios_read_escd(tmpbuf, escd.nv_storage_base)) {
		kfree(tmpbuf);
		return -EIO;
	}

	escd_size =
	    (unsigned char)(tmpbuf[0]) + (unsigned char)(tmpbuf[1]) * 256;

	/* sanity check */
	if (escd_size > MAX_SANE_ESCD_SIZE) {
		printk(KERN_ERR "PnPBIOS: %s: ESCD size reported by"
				" BIOS read_escd call is too great\n", __func__);
		kfree(tmpbuf);
		return -EFBIG;
	}

	seq_write(m, tmpbuf, escd_size);
	kfree(tmpbuf);
	return 0;
}


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thomas hoodthomas hood2112.14%116.67%


alexey dobriyanalexey dobriyan158.67%116.67%


jesper juhljesper juhl63.47%116.67%


robert p. j. dayrobert p. j. day10.58%116.67%


Total173100.00%6100.00%






static int escd_proc_open(struct inode *inode, struct file *file)
{
	return single_open(file, escd_proc_show, NULL);
}


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dave jonesdave jones623.08%150.00%


Total26100.00%2100.00%




static const struct file_operations escd_proc_fops = {
	.owner		= THIS_MODULE,
	.open		= escd_proc_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};




static int pnp_legacyres_proc_show(struct seq_file *m, void *v)
{
	void *buf;

	buf = kmalloc(65536, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;
	if (pnp_bios_get_stat_res(buf)) {
		kfree(buf);
		return -EIO;
	}

	seq_write(m, buf, 65536);
	kfree(buf);
	return 0;
}


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alexey dobriyanalexey dobriyan5170.83%150.00%


dave jonesdave jones2129.17%150.00%


Total72100.00%2100.00%






static int pnp_legacyres_proc_open(struct inode *inode, struct file *file)
{
	return single_open(file, pnp_legacyres_proc_show, NULL);
}


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alexey dobriyanalexey dobriyan2076.92%150.00%


linus torvaldslinus torvalds623.08%150.00%


Total26100.00%2100.00%




static const struct file_operations pnp_legacyres_proc_fops = {
	.owner		= THIS_MODULE,
	.open		= pnp_legacyres_proc_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};




static int pnp_devices_proc_show(struct seq_file *m, void *v)
{
	struct pnp_bios_node *node;
	u8 nodenum;

	node = kzalloc(node_info.max_node_size, GFP_KERNEL);
	if (!node)
		return -ENOMEM;

	for (nodenum = 0; nodenum < 0xff;) {
		u8 thisnodenum = nodenum;

		if (pnp_bios_get_dev_node(&nodenum, PNPMODE_DYNAMIC, node))
			break;
		seq_printf(m, "%02x\t%08x\t%3phC\t%04x\n",
			     node->handle, node->eisa_id,
			     node->type_code, node->flags);
		if (nodenum <= thisnodenum) {
			printk(KERN_ERR
			       "%s Node number 0x%x is out of sequence following node 0x%x. Aborting.\n",
			       "PnPBIOS: proc_read_devices:",
			       (unsigned int)nodenum,
			       (unsigned int)thisnodenum);
			break;
		}
	}
	kfree(node);
	return 0;
}


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dave jonesdave jones3626.87%116.67%


alexey dobriyanalexey dobriyan118.21%116.67%


adam belayadam belay10.75%116.67%


robert p. j. dayrobert p. j. day10.75%116.67%


andy shevchenkoandy shevchenko10.75%116.67%


Total134100.00%6100.00%






static int pnp_devices_proc_open(struct inode *inode, struct file *file)
{
	return single_open(file, pnp_devices_proc_show, NULL);
}


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linus torvaldslinus torvalds623.08%150.00%


Total26100.00%2100.00%




static const struct file_operations pnp_devices_proc_fops = {
	.owner		= THIS_MODULE,
	.open		= pnp_devices_proc_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};




static int pnpbios_proc_show(struct seq_file *m, void *v)
{
	void *data = m->private;
	struct pnp_bios_node *node;
	int boot = (long)data >> 8;
	u8 nodenum = (long)data;
	int len;

	node = kzalloc(node_info.max_node_size, GFP_KERNEL);
	if (!node)
		return -ENOMEM;
	if (pnp_bios_get_dev_node(&nodenum, boot, node)) {
		kfree(node);
		return -EIO;
	}
	len = node->size - sizeof(struct pnp_bios_node);
	seq_write(m, node->data, len);
	kfree(node);
	return 0;
}


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alexey dobriyanalexey dobriyan1814.63%125.00%


dave jonesdave jones75.69%125.00%


robert p. j. dayrobert p. j. day10.81%125.00%


Total123100.00%4100.00%






static int pnpbios_proc_open(struct inode *inode, struct file *file)
{
	return single_open(file, pnpbios_proc_show, PDE_DATA(inode));
}


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linus torvaldslinus torvalds26.90%133.33%


al viroal viro13.45%133.33%


Total29100.00%3100.00%






static ssize_t pnpbios_proc_write(struct file *file, const char __user *buf,
				  size_t count, loff_t *pos)
{
	void *data = PDE_DATA(file_inode(file));
	struct pnp_bios_node *node;
	int boot = (long)data >> 8;
	u8 nodenum = (long)data;
	int ret = count;

	node = kzalloc(node_info.max_node_size, GFP_KERNEL);
	if (!node)
		return -ENOMEM;
	if (pnp_bios_get_dev_node(&nodenum, boot, node)) {
		ret = -EIO;
		goto out;
	}
	if (count != node->size - sizeof(struct pnp_bios_node)) {
		ret = -EINVAL;
		goto out;
	}
	if (copy_from_user(node->data, buf, count)) {
		ret = -EFAULT;
		goto out;
	}
	if (pnp_bios_set_dev_node(node->handle, boot, node) != 0) {
		ret = -EINVAL;
		goto out;
	}
	ret = count;
out:
	kfree(node);
	return ret;
}


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andrew mortonandrew morton4925.52%114.29%


alexey dobriyanalexey dobriyan147.29%114.29%


al viroal viro52.60%342.86%


robert p. j. dayrobert p. j. day10.52%114.29%


Total192100.00%7100.00%




static const struct file_operations pnpbios_proc_fops = {
	.owner		= THIS_MODULE,
	.open		= pnpbios_proc_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
	.write		= pnpbios_proc_write,
};




int pnpbios_interface_attach_device(struct pnp_bios_node *node)
{
	char name[3];

	sprintf(name, "%02x", node->handle);

	if (!proc_pnp)
		return -EIO;
	if (!pnpbios_dont_use_current_config) {
		proc_create_data(name, 0644, proc_pnp, &pnpbios_proc_fops,
				 (void *)(long)(node->handle));
	}

	if (!proc_pnp_boot)
		return -EIO;
	if (proc_create_data(name, 0644, proc_pnp_boot, &pnpbios_proc_fops,
			     (void *)(long)(node->handle + 0x100)))
		return 0;
	return -EIO;
}


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adam belayadam belay2824.78%240.00%


alexey dobriyanalexey dobriyan1715.04%120.00%


dave jonesdave jones10.88%120.00%


Total113100.00%5100.00%



/*
 * When this is called, pnpbios functions are assumed to
 * work and the pnpbios_dont_use_current_config flag
 * should already have been set to the appropriate value
 */



int __init pnpbios_proc_init(void)
{
	proc_pnp = proc_mkdir("bus/pnp", NULL);
	if (!proc_pnp)
		return -EIO;
	proc_pnp_boot = proc_mkdir("boot", proc_pnp);
	if (!proc_pnp_boot)
		return -EIO;
	proc_create("devices", 0, proc_pnp, &pnp_devices_proc_fops);
	proc_create("configuration_info", 0, proc_pnp, &pnpconfig_proc_fops);
	proc_create("escd_info", 0, proc_pnp, &escd_info_proc_fops);
	proc_create("escd", S_IRUSR, proc_pnp, &escd_proc_fops);
	proc_create("legacy_device_resources", 0, proc_pnp, &pnp_legacyres_proc_fops);

	return 0;
}


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alexey dobriyanalexey dobriyan1715.89%240.00%


dave jonesdave jones1211.21%120.00%


linus torvaldslinus torvalds43.74%120.00%


Total107100.00%5100.00%






void __exit pnpbios_proc_exit(void)
{
	int i;
	char name[3];

	if (!proc_pnp)
		return;

	for (i = 0; i < 0xff; i++) {
		sprintf(name, "%02x", i);
		if (!pnpbios_dont_use_current_config)
			remove_proc_entry(name, proc_pnp);
		remove_proc_entry(name, proc_pnp_boot);
	}
	remove_proc_entry("legacy_device_resources", proc_pnp);
	remove_proc_entry("escd", proc_pnp);
	remove_proc_entry("escd_info", proc_pnp);
	remove_proc_entry("configuration_info", proc_pnp);
	remove_proc_entry("devices", proc_pnp);
	remove_proc_entry("boot", proc_pnp);
	remove_proc_entry("bus/pnp", NULL);
}

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dave jonesdave jones3126.96%133.33%


alexey dobriyanalexey dobriyan21.74%133.33%


Total115100.00%3100.00%




Overall Contributors
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alexey dobriyanalexey dobriyan50532.52%210.53%


linus torvaldslinus torvalds50432.45%15.26%


dave jonesdave jones33821.76%210.53%


adam belayadam belay1076.89%315.79%


andrew mortonandrew morton523.35%15.26%


thomas hoodthomas hood251.61%15.26%


jesper juhljesper juhl60.39%15.26%


al viroal viro60.39%315.79%


robert p. j. dayrobert p. j. day40.26%15.26%


martin daleckimartin dalecki30.19%15.26%


bjorn helgaasbjorn helgaas10.06%15.26%


andy shevchenkoandy shevchenko10.06%15.26%


justin mattockjustin mattock10.06%15.26%


Total1553100.00%19100.00%

  
Directory: drivers/pnp/pnpbios



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